UWP的拖拽功能

Posted 2020-06-13

简单的拖拽实现：

        <Grid x:Name="G1" AllowDrop="True" DragEnter="G1_DragEnter"
              Drop="G1_Drop"
              Background="Green"/>

        private void G1_DragEnter(object sender, DragEventArgs e)
        {
            e.AcceptedOperation = Windows.ApplicationModel.DataTransfer.DataPackageOperation.Copy;
        }

        private async void G1_Drop(object sender, DragEventArgs e)
        {
            var fileFromDesktop = (StorageFile)(await e.DataView.GetStorageItemsAsync())[0];
            var bitImg = new BitmapImage();
            bitImg.SetSource(await fileFromDesktop.OpenReadAsync());
            var imageControl = new Image();
            imageControl.Source = bitImg;
            G1.Children.Add(imageControl);
        }

 复杂的可以参考这博客：Windows 10 - Modern Drag and Drop for Windows Universal Applications

实现了异步执行Drop,相关的代码在这。